Update almost all tests (except co19) to use the new try-catch syntax.

tests/language/execute_finally8_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // This test ensures that the finally block executes correctly when
 // there are throw, break and return statements in the finally block.
 
 class Hello {
  static var sum;
 
  static foo() {
@@ skipping 51 matching lines @@
 
  static void main() {
    foo1();
    Expect.equals(2, sum);
    foo2();
    Expect.equals(2, sum);
    foo3();
    Expect.equals(2, sum);
    try {
      foo();
-   } catch (var e) {
+   } catch (e) {
    }
    Expect.equals(2, sum);
  }
 
 }
 
 main() {
   Hello.main();
 }